Basic Information
Bohr Model
Static
Interactive
Descriptive Numbers
CAS Number
53850-36-5
Mendeleev Number
46
Mass
Atomic Mass
267 Da
Periodic Position
X Position
4
Y Position
7
Period
7
Group
4
Classification
Block
d
Category
Transition Metal
Goldschmidt
Synthetic
Color
Jmol
#CC0059
Molcas Gv
#CC0059
Atomic Radius
Covalent (Triple Bound)
131
Covalent (Pyykko)
157
Covalent (Pyykko Double)
140
Covalent (Pyykko Triple)
131
Temperature
Melting/Freeze (USE)
2400 °K
Boiling/Density (USE)
5800 °K
Density
STP
23.2 kg/cm³
Heat
Adiabatic Index
N/A
Etymology
Description
It is a radioactive and transactinide element. It is thought to have similar chemical properties to hafnium. Rf-260 was discovered in 1964 at the Joint Institute for Nuclear Research in Dubna (USSR). Researchers at Berkeley discovered the isotopes Unq-257 and Unq-258 in 1964.
Origin Of Word
From chemist and physicist Ernest Rutherford
Symbol Origin
surname, eponym
Etymological Description
This name was given in honor of Ernest Rutherford, who developed the Bohr model of the atom. Rutferfordium is also known as kurchatovium (Ku), in honor of Igor Vasilevich Kurchatov, who contributed to the understanding of the uranium chain reaction and the nuclear reactor. Unilcadium was used as the temporary systematic name.
Discovery & Isolation
Observed/Predicted By
A. Ghiorso et al. (Berkeley Radiation Laboratory) and I. Zvara et al. (at ONAE in Dubna)
Observed/Discovery Year
1969
Isolated Sample By
Joint Institute for Nuclear Research
Production & Use
Sources
It is obtained by bombarding californium-249 with carbon-12 and 13 particles, which form isotopes with half-lives of more than 3 and 4 seconds.
Uses
It has no significant commercial use.
Radioactivity
Half Life
13.1 seconds
Lifetime
18.9 seconds
Decay Mode
Alpha Six
Dipole Polarity
Accepted
112
Uncertainty
10
Electron & Quantum
Oxidation States
4
Electron Configuration
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d2
Quantum Number
Pardon me
Electron Configuration Semantic
[Rn] 5f14 6d2 7s2
Shells-0
2
Shells-1
8
Shells-2
18
Shells-3
32
Shells-4
32
Shells-5
10
Shells-6
2
Ionization Energies-0
580
